GNU gdb (GDB) 7.2
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-pc-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /home/stefano/gnome-shell/install/bin/mutter...done.
(gdb) r
Starting program: /home/stefano/gnome-shell/install/bin/mutter --mutter-plugins=libgnome-shell --replace --sync
[Thread debugging using libthread_db enabled]
[New Thread 0xb63c3b70 (LWP 4893)]
[New Thread 0xb5153b70 (LWP 4894)]
[New Thread 0xb087fb70 (LWP 4895)]
[New Thread 0xb007eb70 (LWP 4896)]
[New Thread 0xaf87ab70 (LWP 4897)]
[Thread 0xb087fb70 (LWP 4895) exited]
[Thread 0xaf87ab70 (LWP 4897) exited]
[Thread 0xb007eb70 (LWP 4896) exited]
[New Thread 0xb007eb70 (LWP 4901)]
[New Thread 0xaf87ab70 (LWP 4902)]
[New Thread 0xb087fb70 (LWP 4903)]
[New Thread 0xa7ddbb70 (LWP 4904)]
[New Thread 0xa754eb70 (LWP 4905)]
[Thread 0xaf87ab70 (LWP 4902) exited]
[Thread 0xa754eb70 (LWP 4905) exited]
[Thread 0xb087fb70 (LWP 4903) exited]
[Thread 0xa7ddbb70 (LWP 4904) exited]
[New Thread 0xa7ddbb70 (LWP 4911)]
[New Thread 0xb087fb70 (LWP 4912)]
[Thread 0xa7ddbb70 (LWP 4911) exited]
[Thread 0xb087fb70 (LWP 4912) exited]
[New Thread 0xb087fb70 (LWP 4914)]
[New Thread 0xa7ddbb70 (LWP 4915)]
[Thread 0xb087fb70 (LWP 4914) exited]
[Thread 0xa7ddbb70 (LWP 4915) exited]
[Thread 0xb007eb70 (LWP 4901) exited]
[New Thread 0xb007eb70 (LWP 4917)]
[New Thread 0xa7ddbb70 (LWP 4918)]
[Thread 0xb007eb70 (LWP 4917) exited]
[Thread 0xa7ddbb70 (LWP 4918) exited]
[New Thread 0xa7ddbb70 (LWP 4920)]
[New Thread 0xb007eb70 (LWP 4921)]
[Thread 0xb007eb70 (LWP 4921) exited]
[New Thread 0xb007eb70 (LWP 4922)]
[New Thread 0xb087fb70 (LWP 4923)]
[Thread 0xb007eb70 (LWP 4922) exited]
[Thread 0xb087fb70 (LWP 4923) exited]

Program received signal SIGSEGV, Segmentation fault.
0x00000000 in ?? ()
(gdb) bt
#0  0x00000000 in ?? ()
#1  0xb6ace5d7 in _swrast_read_rgba_span (ctx=0x8172a00, rb=0x8a89bc8, n=22, x=1169, y=39, dstType=5126, rgba=0xb663c008) at swrast/s_span.c:1359
#2  0xb6acab3c in read_rgba_pixels (ctx=0x8172a00, x=1169, y=39, width=22, height=22, format=6406, type=5121, packing=0x81816b0, pixels=<value optimized out>)
    at swrast/s_readpix.c:341
#3  _swrast_ReadPixels (ctx=0x8172a00, x=1169, y=39, width=22, height=22, format=6406, type=5121, packing=0x81816b0, pixels=<value optimized out>)
    at swrast/s_readpix.c:509
#4  0xb69d4d59 in radeonReadPixels (ctx=0x8172a00, x=1169, y=39, width=22, height=22, format=6406, type=5121, pack=0x81816b0, pixels=0x8c5c8f0)
    at radeon_pixel_read.c:221
#5  0xb6a4c753 in _mesa_ReadPixels (x=1169, y=39, width=22, height=22, format=6406, type=5121, pixels=0x8c5c8f0) at main/readpix.c:232
#6  0xb7aa3a6a in _cogl_read_pixels_with_rowstride (x=1169, y=39, width=22, height=22, source=COGL_READ_PIXELS_COLOR_BUFFER, format=COGL_PIXEL_FORMAT_A_8, 
    pixels=0x8c5c8f0 "", rowstride=24) at ./cogl.c:654
#7  0xb7ac6808 in get_texture_bits_via_offscreen (texture_handle=0x89ccb70, subtexture_coords=0xbfffc3c0, virtual_coords=0xbfffc360, user_data=0xbfffc6a4)
    at ./cogl-texture.c:1213
#8  texture_get_cb (texture_handle=0x89ccb70, subtexture_coords=0xbfffc3c0, virtual_coords=0xbfffc360, user_data=0xbfffc6a4) at ./cogl-texture.c:1327
#9  0xb7ac51db in _cogl_sub_texture_foreach_cb (handle=0x89ccb70, slice_coords=0xbfffc3c0, full_virtual_coords=0xbfffc430, user_data=0xbfffc5b4)
    at ./cogl-sub-texture.c:176
#10 0xb7ac7b82 in _cogl_texture_2d_manual_repeat_cb (coords=0xbfffc430, user_data=0xbfffc484) at ./cogl-texture-2d.c:93
#11 0xb7ac5d6b in _cogl_texture_iterate_manual_repeats (callback=0xb7ac7b20 <_cogl_texture_2d_manual_repeat_cb>, tx_1=0.570800781, ty_1=0.0190429688, tx_2=0.581542969, 
    ty_2=0.0297851562, user_data=0xbfffc484) at ./cogl-texture.c:387
#12 0xb7ac7a85 in _cogl_texture_2d_foreach_sub_texture_in_region (tex=0x89ccb70, virtual_tx_1=0.570800781, virtual_ty_1=0.0190429688, virtual_tx_2=0.581542969, 
    virtual_ty_2=0.0297851562, callback=0xb7ac50e0 <_cogl_sub_texture_foreach_cb>, user_data=0xbfffc5b4) at ./cogl-texture-2d.c:119
#13 0xb7ac6c6c in _cogl_texture_foreach_sub_texture_in_region (handle=0x89ccb70, virtual_tx_1=0.570800781, virtual_ty_1=0.0190429688, virtual_tx_2=0.581542969, 
    virtual_ty_2=0.0297851562, callback=0xb7ac50e0 <_cogl_sub_texture_foreach_cb>, user_data=0xbfffc5b4) at ./cogl-texture.c:736
#14 0xb7ac5441 in _cogl_sub_texture_manual_repeat_cb (coords=0xbfffc560, user_data=0xbfffc5b4) at ./cogl-sub-texture.c:192
#15 0xb7ac5d6b in _cogl_texture_iterate_manual_repeats (callback=0xb7ac53d0 <_cogl_sub_texture_manual_repeat_cb>, tx_1=0, ty_1=0, tx_2=1, ty_2=1, user_data=0xbfffc5b4)
    at ./cogl-texture.c:387
#16 0xb7ac53c5 in _cogl_sub_texture_foreach_sub_texture_in_region (tex=0x8870338, virtual_tx_1=0, virtual_ty_1=0, virtual_tx_2=1, virtual_ty_2=1, 
    callback=0xb7ac6510 <texture_get_cb>, user_data=0xbfffc6a4) at ./cogl-sub-texture.c:218
#17 0xb7ac6c6c in _cogl_texture_foreach_sub_texture_in_region (handle=0x8870338, virtual_tx_1=0, virtual_ty_1=0, virtual_tx_2=1, virtual_ty_2=1, 
    callback=0xb7ac6510 <texture_get_cb>, user_data=0xbfffc6a4) at ./cogl-texture.c:736
#18 0xb7acdcaa in _cogl_atlas_texture_foreach_sub_texture_in_region (tex=0x8bdcd88, virtual_tx_1=0, virtual_ty_1=0, virtual_tx_2=1, virtual_ty_2=1, 
    callback=0xb7ac6510 <texture_get_cb>, user_data=0xbfffc6a4) at ./cogl-atlas-texture.c:149
#19 0xb7ac6c6c in _cogl_texture_foreach_sub_texture_in_region (handle=0x8bdcd88, virtual_tx_1=0, virtual_ty_1=0, virtual_tx_2=1, virtual_ty_2=1, 
    callback=0xb7ac6510 <texture_get_cb>, user_data=0xbfffc6a4) at ./cogl-texture.c:736
#20 0xb7ac748e in cogl_texture_get_data (handle=0x8bdcd88, format=COGL_PIXEL_FORMAT_A_8, rowstride=24, data=0x8c5c8f0 "") at ./cogl-texture.c:1438
#21 0xb5b822ea in _st_create_shadow_material (shadow_spec=0x8c2c590, src_texture=0x8bdcd88) at st/st-private.c:455
#22 0xb5b9799a in st_theme_node_render_resources (node=0x8bf2450, box=0xbfffca40, paint_opacity=255 '\377') at st/st-theme-node-drawing.c:645
#23 st_theme_node_paint (node=0x8bf2450, box=0xbfffca40, paint_opacity=255 '\377') at st/st-theme-node-drawing.c:1062
#24 0xb5b9c1ce in st_widget_paint (actor=0x8b60ca0) at st/st-widget.c:395
#25 0xb5b72dee in st_bin_paint (self=0x8b60ca0) at st/st-bin.c:113
#26 0xb754fe9c in g_cclosure_marshal_VOID__VOID (closure=0x8146ef8, return_value=0x0, n_param_values=1, param_values=0xb0a409a8, invocation_hint=0xbfffcc20, 
    marshal_data=0xb5b72da0) at gmarshal.c:79
#27 0xb75311f7 in g_type_class_meta_marshal (closure=0x8146ef8, return_value=0x0, n_param_values=1, param_values=0xb0a409a8, invocation_hint=0xbfffcc20, 
    marshal_data=0x64) at gclosure.c:877
#28 0xb75327d0 in g_closure_invoke (closure=0x8146ef8, return_value=0x0, n_param_values=1, param_values=0xb0a409a8, invocation_hint=0xbfffcc20) at gclosure.c:766
#29 0xb75466ad in signal_emit_unlocked_R (node=0x8146fa0, detail=0, instance=0x8b60ca0, emission_return=0x0, instance_and_params=0xb0a409a8) at gsignal.c:3290
#30 0xb754f51b in g_signal_emit_valist (instance=0x8b60ca0, signal_id=192, detail=0, var_args=0xbfffcdcc "w=\252\267\020\356\023\b\300") at gsignal.c:2983
#31 0xb754f6d2 in g_signal_emit (instance=0x8b60ca0, signal_id=192, detail=0) at gsignal.c:3040
#32 0xb7a1b5c8 in clutter_actor_paint (self=0x8b60ca0) at ./clutter-actor.c:2697
#33 0xb74434f9 in g_list_foreach (list=<value optimized out>, func=0xb7a1adf0 <clutter_actor_paint>, user_data=0x0) at glist.c:938
#34 0xb7a4aeac in clutter_group_real_paint (actor=0x8539760) at ./clutter-group.c:281
#35 0xb754fe9c in g_cclosure_marshal_VOID__VOID (closure=0x8146ef8, return_value=0x0, n_param_values=1, param_values=0x81583b0, invocation_hint=0xbfffd250, 
    marshal_data=0xb7a4ae00) at gmarshal.c:79
#36 0xb75311f7 in g_type_class_meta_marshal (closure=0x8146ef8, return_value=0x0, n_param_values=1, param_values=0x81583b0, invocation_hint=0xbfffd250, 
    marshal_data=0x64) at gclosure.c:877
#37 0xb75327d0 in g_closure_invoke (closure=0x8146ef8, return_value=0x0, n_param_values=1, param_values=0x81583b0, invocation_hint=0xbfffd250) at gclosure.c:766
#38 0xb75466ad in signal_emit_unlocked_R (node=0x8146fa0, detail=0, instance=0x8539760, emission_return=0x0, instance_and_params=0x81583b0) at gsignal.c:3290
#39 0xb754f51b in g_signal_emit_valist (instance=0x8539760, signal_id=192, detail=0, var_args=0xbfffd3fc "H\324\377\277GFRD") at gsignal.c:2983
#40 0xb754f6d2 in g_signal_emit (instance=0x8539760, signal_id=192, detail=0) at gsignal.c:3040
#41 0xb7a1b5c8 in clutter_actor_paint (self=0x8539760) at ./clutter-actor.c:2697
#42 0xb74434f9 in g_list_foreach (list=<value optimized out>, func=0xb7a1adf0 <clutter_actor_paint>, user_data=0x0) at glist.c:938
#43 0xb5b7a001 in st_container_foreach (container=0x8b6ec48, callback=0xb7a1adf0 <clutter_actor_paint>, user_data=0x0) at st/st-container.c:295
#44 0xb7a40465 in clutter_container_foreach (container=0x8b6ec48, callback=0xb7a1adf0 <clutter_actor_paint>, user_data=0x0) at ./clutter-container.c:447
#45 0xb5b7d68e in st_group_paint (actor=0x8b6ec48) at st/st-group.c:60
#46 0xb754fe9c in g_cclosure_marshal_VOID__VOID (closure=0x8146ef8, return_value=0x0, n_param_values=1, param_values=0x88fd9c0, invocation_hint=0xbfffd8d0, 
    marshal_data=0xb5b7d630) at gmarshal.c:79
#47 0xb75311f7 in g_type_class_meta_marshal (closure=0x8146ef8, return_value=0x0, n_param_values=1, param_values=0x88fd9c0, invocation_hint=0xbfffd8d0, 
    marshal_data=0x64) at gclosure.c:877
#48 0xb75327d0 in g_closure_invoke (closure=0x8146ef8, return_value=0x0, n_param_values=1, param_values=0x88fd9c0, invocation_hint=0xbfffd8d0) at gclosure.c:766
#49 0xb75466ad in signal_emit_unlocked_R (node=0x8146fa0, detail=0, instance=0x8b6ec48, emission_return=0x0, instance_and_params=0x88fd9c0) at gsignal.c:3290
#50 0xb754f51b in g_signal_emit_valist (instance=0x8b6ec48, signal_id=192, detail=0, var_args=0xbfffda7c "") at gsignal.c:2983
#51 0xb754f6d2 in g_signal_emit (instance=0x8b6ec48, signal_id=192, detail=0) at gsignal.c:3040
#52 0xb7a1b5c8 in clutter_actor_paint (self=0x8b6ec48) at ./clutter-actor.c:2697
#53 0xb74434f9 in g_list_foreach (list=<value optimized out>, func=0xb7a1adf0 <clutter_actor_paint>, user_data=0x0) at glist.c:938
#54 0xb7a4aeac in clutter_group_real_paint (actor=0x8538220) at ./clutter-group.c:281
#55 0xb754fe9c in g_cclosure_marshal_VOID__VOID (closure=0x8146ef8, return_value=0x0, n_param_values=1, param_values=0x88fd850, invocation_hint=0xbfffdf00, 
    marshal_data=0xb7a4ae00) at gmarshal.c:79
#56 0xb75311f7 in g_type_class_meta_marshal (closure=0x8146ef8, return_value=0x0, n_param_values=1, param_values=0x88fd850, invocation_hint=0xbfffdf00, 
    marshal_data=0x64) at gclosure.c:877
#57 0xb75327d0 in g_closure_invoke (closure=0x8146ef8, return_value=0x0, n_param_values=1, param_values=0x88fd850, invocation_hint=0xbfffdf00) at gclosure.c:766
#58 0xb75466ad in signal_emit_unlocked_R (node=0x8146fa0, detail=0, instance=0x8538220, emission_return=0x0, instance_and_params=0x88fd850) at gsignal.c:3290
#59 0xb754f51b in g_signal_emit_valist (instance=0x8538220, signal_id=192, detail=0, 
    var_args=0xbfffe0ac "\223\245U\267ȁ\220\bЈ\220\b\030\341\377\277(\300\240\267t\255\260\267\001") at gsignal.c:2983
#60 0xb754f6d2 in g_signal_emit (instance=0x8538220, signal_id=192, detail=0) at gsignal.c:3040
#61 0xb7a1b5c8 in clutter_actor_paint (self=0x8538220) at ./clutter-actor.c:2697
#62 0xb74434f9 in g_list_foreach (list=<value optimized out>, func=0xb7a1adf0 <clutter_actor_paint>, user_data=0x0) at glist.c:938
#63 0xb7a4aeac in clutter_group_real_paint (actor=0x8538660) at ./clutter-group.c:281
#64 0xb754fe9c in g_cclosure_marshal_VOID__VOID (closure=0x8146ef8, return_value=0x0, n_param_values=1, param_values=0x88fd5a8, invocation_hint=0xbfffe530, 
    marshal_data=0xb7a4ae00) at gmarshal.c:79
#65 0xb75311f7 in g_type_class_meta_marshal (closure=0x8146ef8, return_value=0x0, n_param_values=1, param_values=0x88fd5a8, invocation_hint=0xbfffe530, 
    marshal_data=0x64) at gclosure.c:877
#66 0xb75327d0 in g_closure_invoke (closure=0x8146ef8, return_value=0x0, n_param_values=1, param_values=0x88fd5a8, invocation_hint=0xbfffe530) at gclosure.c:766
#67 0xb75466ad in signal_emit_unlocked_R (node=0x8146fa0, detail=0, instance=0x8538660, emission_return=0x0, instance_and_params=0x88fd5a8) at gsignal.c:3290
#68 0xb754f51b in g_signal_emit_valist (instance=0x8538660, signal_id=192, detail=0, 
    var_args=0xbfffe6dc "\320\335Ƕh\362\032\bp\362\032\b(\347\377\277\b֞\266p\362\032\b\210\066\273\266") at gsignal.c:2983
#69 0xb754f6d2 in g_signal_emit (instance=0x8538660, signal_id=192, detail=0) at gsignal.c:3040
#70 0xb7a1b5c8 in clutter_actor_paint (self=0x8538660) at ./clutter-actor.c:2697
#71 0xb74434f9 in g_list_foreach (list=<value optimized out>, func=0xb7a1adf0 <clutter_actor_paint>, user_data=0x0) at glist.c:938
#72 0xb7a4aeac in clutter_group_real_paint (actor=0x852e038) at ./clutter-group.c:281
#73 0xb7a6e06c in clutter_stage_paint (self=0x852e038) at ./clutter-stage.c:442
#74 0xb754fe9c in g_cclosure_marshal_VOID__VOID (closure=0x8146ef8, return_value=0x0, n_param_values=1, param_values=0x87ab590, invocation_hint=0xbfffebc0, 
    marshal_data=0xb7a6df60) at gmarshal.c:79
#75 0xb75311f7 in g_type_class_meta_marshal (closure=0x8146ef8, return_value=0x0, n_param_values=1, param_values=0x87ab590, invocation_hint=0xbfffebc0, 
    marshal_data=0x64) at gclosure.c:877
#76 0xb75328a2 in g_closure_invoke (closure=0x8146ef8, return_value=0x0, n_param_values=1, param_values=0x87ab590, invocation_hint=0xbfffebc0) at gclosure.c:766
#77 0xb75466ad in signal_emit_unlocked_R (node=0x8146fa0, detail=0, instance=0x852e038, emission_return=0x0, instance_and_params=0x87ab590) at gsignal.c:3290
#78 0xb754f51b in g_signal_emit_valist (instance=0x852e038, signal_id=192, detail=0, 
    var_args=0xbfffed6c "l\217\260\267\070\340R\bH\354\266\b\230\355\377\277\270\032O\b\230\240L\b\270\032O\b") at gsignal.c:2983
#79 0xb754f6d2 in g_signal_emit (instance=0x852e038, signal_id=192, detail=0) at gsignal.c:3040
#80 0xb7a1b5c8 in clutter_actor_paint (self=0x852e038) at ./clutter-actor.c:2697
#81 0xb7a72dba in _clutter_stage_do_paint (stage=0x852e038, clip=0x0) at ./clutter-stage.c:381
#82 0xb7a07fd1 in _clutter_stage_glx_redraw (stage_glx=0x84ca098, stage=0x852e038) at ./glx/clutter-stage-glx.c:559
#83 0xb7a0591b in clutter_backend_glx_redraw (backend=0x80ec808, stage=0x852e038) at ./glx/clutter-backend-glx.c:780
#84 0xb7a2910e in _clutter_backend_redraw (backend=0x80ec808, stage=0x852e038) at ./clutter-backend.c:352
#85 0xb7a53819 in _clutter_do_redraw (stage=0x852e038) at ./clutter-main.c:260
#86 0xb7a6ee1f in _clutter_stage_do_update (stage=0x852e038) at ./clutter-stage.c:825
#87 0xb7a566af in clutter_clock_dispatch (source=0x852cbd0, callback=0, user_data=0x0) at ./clutter-master-clock.c:384
#88 0xb7447e52 in g_main_dispatch (context=0x80e9850) at gmain.c:2440
#89 g_main_context_dispatch (context=0x80e9850) at gmain.c:3013
#90 0xb7448630 in g_main_context_iterate (context=0x80e9850, block=1, dispatch=1, self=<value optimized out>) at gmain.c:3091
#91 0xb7448cfb in g_main_loop_run (loop=0x8107bd8) at gmain.c:3299
#92 0x0808711c in main (argc=1, argv=0xbffff8b4) at core/main.c:722
(gdb) quit
A debugging session is active.

	Inferior 1 [process 4886] will be killed.

Quit anyway? (y or n) 